Social-media execs testify before Congress. Facebook's chief operating officer, Sheryl Sandburg, is set to testify before the Senate Intelligence Committee on Wednesday about her company's response to Russian interference during the 2016 election. Twitter CEO Jack Dorsey will also appear.

Theranos is about to shut down for good. The embattled blood-testing startup plans to spend its next few months repaying creditors with its remaining resources before shutting down for good, The Wall Street Journal says, citing a shareholder letter.